Water Filters - Why
are there different filter cartridges for city and well water?

What's the Difference?

Well Water
Some harmless bacteria, which may be found in some well water systems, may attack cellulose
(paper) media cartridges such as the TO1
and RS1. If your well water cartridge seems to disintegrate or develops a musty or moldy odor, switch to a synthetic media cartridge such as the
RS2 or RS14
or TO3

Chlorinated city and town water systems
For Chlorinated city and town water systems use any of the well water
cartridges above or the simple cellulose cartridges such as the TO1
and RS1)

Because of the product’s limited service life and to
prevent costly repairs or possible water damage, we strongly recommend that the bottom of all plastic housings be replaced
every ten years. If the bottom of your housing has been in use for longer than this period, it should be replaced immediately.
Date the bottom of any new or replacement housing to indicate the next recommended replacement date.